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| Alvarez Colombo, G.L.; Viñas, M.D.. |
| Themisto gaudichaudii, the most abundant and widely distributed hyperiid amphipod in Argentine shelf waters, provides a source of food for several species of economical value such as the anchovy, mackerel, hake, and squid. Predictive dry weight-length and volume-length regression were established in order to provide an indirect estimation of the individual body mass from a measurement of body length. Samples were collected in San Jorge Gulf and fixed with a 4 o/o formaldehyde solution. The possible effect of formaldehyde fixation on dry weight and volume is discussed. |
| Tipo: Journal Contribution |
Palavras-chave: Dry weight; Length-weight relationships. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/1928 |
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| Wöhler, O.C.; Giussi, A.R.; García de la Rosa, S.B.; Sánchez, M.F.; Hansen, J.E.; Cordo, H.D.; Alvarez Colombo, G.L.; Incorvaia, I.S.; Reta, R.; Abachián, V.E.. |
| An assessment survey on the austral fish was carried out during the summer 1997 on both the shelf and slope off southern Argentina. The cruise covered 101,508 nm2 between 45° and 54° 30'S and depths between 50 and 400 m. The survey did not include the area controlled by the United Kingdom. Considering the total area as an undivided stratum, a random sampling was used to estimate demersal fish biomass and a delta distribution-based model to evaluate mean densities. Out of the forty five species caught 28 were bony fish and 17 elasmobranch. Four cephalopod mollusc species were also identified. A biomass of 3.2 million tons (CI(95o/o): 1.90 - 6.06 millions) proved that longtail hake was the most abundant resource within the region followed by common hake... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Fishery surveys; Biomass; Population structure; Feeding; Parasitism; Environmental conditions. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/5782 |
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